diff --git a/board-definition/data/boards/board_parts/zynq/zturn/1.0/ps7.tcl b/board-definition/data/boards/board_parts/zynq/zturn/1.0/ps7.tcl
index af65c89..21c209d 100644
--- a/board-definition/data/boards/board_parts/zynq/zturn/1.0/ps7.tcl
+++ b/board-definition/data/boards/board_parts/zynq/zturn/1.0/ps7.tcl
@@ -31,7 +31,7 @@ set_property -dict [ list \
 	CONFIG.PCW_APU_PERIPHERAL_FREQMHZ {666.666666} \
 	CONFIG.PCW_UIPARAM_ACT_DDR_FREQ_MHZ {533.333333} \
 	CONFIG.PCW_ENET0_PERIPHERAL_FREQMHZ {1000 Mbps} \
-	CONFIG.PCW_SDIO_PERIPHERAL_FREQMHZ {125} \
+	CONFIG.PCW_SDIO_PERIPHERAL_FREQMHZ {100} \
 	CONFIG.PCW_QSPI_PERIPHERAL_FREQMHZ {200.000000} \
 	CONFIG.PCW_UART_PERIPHERAL_FREQMHZ {100} \
 	CONFIG.PCW_USB0_PERIPHERAL_FREQMHZ {60} \